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|Title:||Evaluation of sulfonated graphene sheets as sorbent for micro-solid-phase extraction combined with gas chromatography-mass spectrometry|
Polycyclic aromatic hydrocarbons
|Citation:||Zhang, H., Low, W.P., Lee, H.K. (2012-04-13). Evaluation of sulfonated graphene sheets as sorbent for micro-solid-phase extraction combined with gas chromatography-mass spectrometry. Journal of Chromatography A 1233 : 16-21. ScholarBank@NUS Repository. https://doi.org/10.1016/j.chroma.2012.02.020|
|Abstract:||This report describes the use of sulfonated graphene sheets as sorbent in micro-solid-phase extraction (μ-SPE), together with gas chromatography-mass spectrometry, for the determination of polycyclic aromatic hydrocarbons (PAHs) in water. In this study, for the first time, graphene sheets were used as a sorbent material for this mode of microextraction. The modified graphene sheets were characterized by transmission electron microscopy, Fourier transform infrared spectroscopy, and elemental analysisμ-SPE parameters such as extraction time, desorption time and desorption solvent were optimized. The method showed good precision, reproducibility and linear response for PAH analysis over a concentration range of 0.05-100μg/L for naphthalene and 0.01-100μg/L for the remaining PAHs (acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene and pyrene) with coefficient of determination (r2) of higher than 0.992. Limits of detection of from 0.8 to 3.9ng/L for 7 PAHs were achieved. The developed method was successfully applied to determine PAHs in river water samples. © 2012 Elsevier B.V.|
|Source Title:||Journal of Chromatography A|
|Appears in Collections:||Staff Publications|
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